Estimation of required minimum binder content by assessing the liquefaction potential of early age cemented mine backfill

Tikou Belem, Hervé Effenguet, Mamert Mbonimpa

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Mining Geotechnics II

ABSTRACT: This paper attempts to assess empirically the liquefaction potential of cemented paste backfill (CPB) at early age (£ 7 days). The ficyclic failurefl or softening (equivalent to liquefaction for clay-like materials such as CPB) is assessed based on an empirical method. This analysis allowed determining the minimum binder content to avoid the cyclic failure (liquefaction) of cemented mine backfills based on the unconfined compressive strength (UCS).

RÉSUMÉ: Cet article tente d'évaluer empiriquement le potentiel de liquéfaction du remblai cimenté en pâte (RPC) d'âge précoce (£ 7 jours). La "rupture cyclique" ou adoucissement (équivalent à la liquéfaction des matériaux de type argile comme RPC) est évaluée selon une méthode empirique. Cette analyse a permis de déterminer la teneur en liant minimum en fonction de la résistance en compression simple (UCS) pour éviter la rupture cyclique (ou liquéfaction) des remblais miniers cimentés.

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